Subject: [mg3341] Solving sets of differential equations -- this should be easy...

From: axf at HPP.Stanford.EDU (Adam Farquhar)

Date: Thu, 29 Feb 1996 03:23:05 -0500

Organization: Knowledge Systems Lab, Stanford University

Sender: owner-wri-mathgroup at wolfram.com

I have what should be a very simple problem, but I can't convince
Mathematica to give me an answer in the form that I need. I have sets
of equations like
{x[t] == y'[t], y[t] == 5}
that I would like to solve. If I try the obvious
DSolve[{x[t] == y'[t], y[t] == 5},x[t],t]
I get
Out[14]=
{{x[t] -> y'[t]}}
as the result. I would like, of course, to see {{x[t] -> 0}}. How can I
get Mathematica to give me this answer?
The equations are being generated automatically, and Mathematica is being
called remotely. The solution should be in the form of a single
self-contained request with no side-effects.
Many thanks for your help,
Adam
-----
Dr. Adam Farquhar
Knowledge Systems Lab URL: www-ksl.stanford.edu/people/axf
Gates Bldg 2A MC9020 Email: afarquhar at ksl.stanford.edu
Stanford University Tel: 415-723-9770
Stanford, CA 94305 Fax: 415-725-5850
--
-----
Dr. Adam Farquhar
Knowledge Systems Lab URL: www-ksl.stanford.edu/people/axf
Gates Bldg 2A MC9020 Email: afarquhar at ksl.stanford.edu
Stanford University Tel: 415-723-9770
Stanford, CA 94305 Fax: 415-725-5850
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